/*
 * Copyright (C) 2018 niaoge<78493244@qq.com>
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 */
package org.stategen.framework.util;

import java.util.Optional;
import java.util.function.Function;

/**
 * The Class OptionalUtil.
 */
public class OptionalUtil {
    
    public static <V, T> V getOrNull(T t, Function<? super T, V> keyMapper) {
        Optional<T> opt    = Optional.ofNullable(t);
        V           result = opt.map(keyMapper).orElse(null);
        return result;
    }
    
    public static <T> T ifNull(T dest, T defaultV) {
        if (dest == null) {
            return defaultV;
        }
        return dest;
    }
    
    
}
